Method and device for configuring and receiving common control channel

ABSTRACT

The present disclosure provides a method for configuring and receiving a common control channel, and a device for configuring and receiving a common control channel. The method for configuring a common control channel includes: configuring a common control channel and a primary synchronization signal and/or a secondary synchronization signal in a subband where a user equipment resides in a frequency division multiplexing manner; and transmitting the common control channel by using configured resources. Embodiments of the present disclosure may improve resource utilization by configuring the common control channel.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Divisional Application of the U.S. patentapplication Ser. No. 15/926,209 filed on Mar. 20, 2018 and which claimsthe benefit of priority to Chinese Patent Application No.201710182864.3, filed on Mar. 24, 2017, the entire disclosure of whichare incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the field of communication technology,and more particularly, to a method and a device for configuring andreceiving a common control channel.

BACKGROUND

In a 5th generation mobile network system (5th-Generation, 5G), aprimary synchronization signal (PSS), a secondary synchronization signal(SSS) and a physical broadcast channel (PBCH) are included in asynchronization signal and PBCH block (SS/PBCH block). Each SS/PBCHblock may be seen as resources of a beam in a beam sweeping process. Aplurality of SS/PBCH blocks constitute a synchronization signal burst(SS-burst). The synchronization signal burst may be seen as a block ofrelatively concentrated resources. A plurality of synchronization signalbursts constitute a synchronization signal burst set (SS-burst-set). Thebeam sweeping process is repeatedly transmitting the SS/PBCH block ondifferent beams. Based on the training of the beam sweeping, a userequipment may perceive in which beam the strongest signal is received.In addition to the PSS/SSS/PBCH being sent to the user equipment in theform of broadcast, there are other information being sent to the userequipment in the form of broadcast, such as remaining minimum systeminformation (RMSI), paging and time slot structure, which are commoncontrol messages.

In a 5G system, in order to solve the coverage problem at a highfrequency band, a broadcast type of transmission generally adopts a wayof beam sweeping. If different signals and channels adopt different beamsweeping timings, beam sweeping timings will be much more, causing thatthe system needs to design a larger number of downlink symbols, whichincreases a latency of a hybrid automatic repeat request (HARQ)feedback, and increases complexity of system design. Accordingly, oneway is a common control message transmission multiplexing the beamsweeping timing for the SS/PBCH block. Specially, the RMSI and thepaging conduct frequency division multiplexing with the SS/PBCH block,and when the SS/PBCH block completes one round of beam sweeping, theRMSI and the paging also complete one round of beam sweeping. Ingeneral, through a physical downlink control channel (PDCCH), a networkschedules the user equipment to receive the RMSI and the paging messageson a physical downlink shared channel (PDSCH). Scheduling information inthe PDCCH is also referred to as RMSI downlink control information (DCI)and paging DCI.

Accordingly, there is a need for a design of the common control channel,to achieve relatively high resource utilization.

SUMMARY

Embodiments of the present disclosure provide a method and a device forconfiguring a common control channel, to improve resource utilization.

In an embodiment of the present disclosure, a method for configuring acommon control channel is provided, including:

configuring a common control channel and a primary synchronizationsignal and/or a secondary synchronization signal in a subband where auser equipment resides in a frequency division multiplexing manner; andtransmitting the common control channel by using configured resources.

In some embodiment, configuring the common control channel and theprimary synchronization signal and/or the secondary synchronizationsignal in the subband where the user equipment resides in the frequencydivision multiplexing manner includes: in a frequency domain, the commoncontrol channel occupying at least a portion of frequency domainresources other than frequency domain resources occupied by a SS/PBCHblock in the subband, wherein the SS/PBCH block includes the primarysynchronization signal and the secondary synchronization signal.

In some embodiment, configuring the common control channel and theprimary synchronization signal and/or the secondary synchronizationsignal in the subband where the user equipment resides includes: in thefrequency domain, the common control channel occupying at least aportion of frequency domain resources other than frequency domainresources occupied by the primary synchronization signal and thesecondary synchronization signal.

In some embodiment, the common control channel is included in theSS/PBCH block.

In some embodiment, configuring the common control channel and theprimary synchronization signal and/or the secondary synchronizationsignal in the subband where the user equipment resides in the frequencydivision multiplexing manner includes: in a time domain, configuring thecommon control channel to occupy a first symbol or the first symbol anda second symbol occupied by the primary synchronization signal and thesecondary synchronization signal.

In some embodiment, the method for configuring the common controlchannel further includes: configuring the common control channel and theSS/PBCH block in the subband where the user equipment resides in afrequency division multiplexing manner.

In some embodiment, the method for configuring the common controlchannel further includes: configuring the common control channel and theSS/PBCH block in the subband where the user equipment resides in a timedivision multiplexing manner.

In some embodiment, the method for configuring the common controlchannel further includes: configuring a mini-slot for the userequipment, wherein a number of symbols occupied by the mini-slot is anumber of symbols occupied by the SS/PBCH block, and a beam used by themini-slot is a beam used by the SS/PBCH block.

In some embodiment, the method for configuring the common controlchannel further includes: in scheduling information transmitted by thecommon control channel, indicating a location of a physical resourceblock occupied by a common control message bearer channel, or indicatingan index of a resource block group occupied by the common controlmessage bearer channel.

In some embodiment, the method for configuring the common controlchannel further includes: in scheduling information transmitted by thecommon control channel, indicating a location of the physical resourceblock occupied by user equipment dedicated data, or indicating an indexof a resource block group occupied by the user equipment dedicated data.

In some embodiment, the method for configuring the common controlchannel further includes: configuring a demodulation reference signal ofthe common control channel for time and frequency synchronization of theuser equipment.

In some embodiment, the method for configuring the common controlchannel further includes: configuring an initial value of a pseudorandomsequence for the demodulation reference signal according to a cellidentity and a synchronization beam identity, to cause an interferencerandomization among the demodulation reference signals between differentcells or different synchronization beams.

In some embodiment, the user equipment conducts a frequency domainautocorrelation on a channel estimated according to the demodulationreference signal, to obtain time synchronization; and conducts a timedomain autocorrelation on the channel estimated according to thedemodulation reference signal, to obtain frequency synchronization.

In some embodiments, the method for configuring the common controlchannel further includes: when the user equipment transmits and receivesdata in different subbands, configuring different patterns of referencesignals for the user equipment according to a numerology of differentsubbands, and wherein the different patterns of reference signals atleast includes different pseudorandom sequences or differenttime-frequency resource locations; and notifying the user equipment ofthe different patterns of the demodulation reference signal using an RRCsignaling.

In some embodiment, the method for configuring the common controlchannel further includes: configuring the demodulation reference signalof the common control channel for beam training of the user equipment,to obtain a reference signal receiving power for a synchronizationsignal beam.

In some embodiment, configuring the demodulation reference signal of thecommon control channel for beam training includes: configuring aplurality of subdivided beams in each synchronization signal beam tocorrespond to a plurality of ports of the demodulation reference signal,such that the user equipment measures the demodulation reference signalof the plurality of ports, to obtain the reference signal receivingpower of the subdivided beams and the reference signal receiving powerof the synchronization signal beam.

In some embodiment, the user equipment averages the measured referencesignal receiving power of the subdivided beams corresponding to theplurality of ports, to obtain the reference signal receiving power ofthe synchronization signal beam.

In some embodiment, prior to configuring the plurality of subdividedbeams in each synchronization signal beam to correspond to the pluralityof ports of the demodulation reference signal, the method furtherincludes: notifying a number of the plurality of ports to the userequipment in a physical broadcast channel.

In some embodiment, when the reference signal receiving power of thesynchronization signal beam is lower than a predetermined powerthreshold, the user equipment conducts beam training again.

In some embodiment, the method for configuring the common controlchannel further includes: configuring the user equipment to conductmonitoring of the demodulation reference signal for at least a portionof frequency in the subband.

In some embodiment, the method for configuring the common controlchannel further includes: configuring each port of the demodulationreference signal of the common control channel to correspond to aplurality of adjacent subcarriers.

In some embodiment, a particular subcarrier right corresponding to theport and two adjacent subcarriers of the particular subcarrier on thecommon control channel constitute a subcarrier group, and one physicalresource block includes four subcarrier groups, and corresponds to fourports of the demodulation reference signal.

In some embodiment, the method for configuring the common controlchannel further includes: configuring a quasi-co-location placement portfor an antenna of the demodulation reference signal of the commoncontrol channel and an antenna of a channel state information referencesignal, or configuring a quasi-co-location placement for the antenna ofthe demodulation reference signal of the common control channel and theantenna of the channel state information reference signal.

In an embodiment of the present disclosure further, a device forconfiguring a common control channel is further provided, including: acommon channel configuration circuitry, configured to configure thecommon control channel and a primary synchronization signal and/or asecondary synchronization signal in a subband where a user equipmentresides in a frequency division multiplexing manner; and a transmissioncircuitry, configured to transmit the common control channel by usingconfigured resources.

In an embodiment of the present disclosure, a method for receiving acommon control channel is further provided, including: receiving acommon control channel by configured resources, wherein the commoncontrol channel conducts frequency division multiplexing with a primarysynchronization signal and/or a secondary synchronization signal in asubband where a user equipment resides.

In an embodiment of the present disclosure, a solution on a device forreceiving a common control channel is further provided, the device forreceiving a common control channel includes: a common control channelreceiving circuitry, configured to receive the common control channel byconfigured resources, wherein the common control channel conducting afrequency division multiplexing manner with a primary synchronizationsignal and/or a secondary synchronization signal in a subband where auser equipment resides.

Compared with the prior art, embodiments of the present disclosure havethe following benefits.

In embodiments of the present disclosure, a common control channel and aprimary synchronization signal and/or a secondary synchronization signalare configured in a subband where a user equipment resides in afrequency division multiplexing manner; and the common control channelis transmitted using configured resources. In embodiments of the presentdisclosure, a common control channel and a primary synchronizationsignal and/or a secondary synchronization signal are configured in afrequency division multiplexing manner, thereby transmitting the commoncontrol channel and the primary synchronization signal and/or thesecondary synchronization signal on the same symbols (or, timeresources), to achieve relatively high resource utilization. In thisway, beam sweeping timings, latency of HARQ feedback, and complexity ofsystem design may be reduced.

Further, the common control channel and the SS/PBCH block are configuredin the subband where the user equipment resides in a frequency divisionmultiplexing manner; or, the common control channel and the SS/PBCHblock are configured in the subband where the user equipment resides ina time division multiplexing manner. In embodiments of the presentdisclosure, a common control channel and a synchronization signal areconfigured to conduct the frequency division multiplexing or the timedivision multiplexing, thereby improving flexibility of theconfiguration of the common control message. Further, resourceutilization of a subband resource where the user equipment resides maybe improved, and complexity of system design may be reduced.

Further, a demodulation reference signal of the common control channelis configured for time and frequency synchronization of the userequipment; and the demodulation reference signal of the common controlchannel is configured for beam training, to obtain a reference signalreceiving power for a synchronization signal beam. In embodiments of thepresent disclosure, a demodulation reference signal of the commoncontrol channel is configured so as to have various uses, to furtherimprove resource utilization.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically illustrates a flow diagram of a method forconfiguring a common control channel according to an embodiment of thepresent disclosure;

FIG. 2 schematically illustrates an application scenario of the methodfor configuring the common control channel according to an embodiment ofthe present disclosure;

FIG. 3 schematically illustrates another application scenario of themethod for configuring the common control channel according to anembodiment of the present disclosure;

FIG. 4 schematically illustrates another application scenario of themethod for configuring the common control channel according to anembodiment of the present disclosure;

FIG. 5 schematically illustrates a flow diagram of a method forconfiguring a common control channel according to an embodiment of thepresent disclosure;

FIG. 6 schematically illustrates a structural diagram of a device forconfiguring a common control channel according to an embodiment of thepresent disclosure;

FIG. 7 schematically illustrates a structural diagram of a commonchannel configuration circuitry shown in FIG. 6; and

FIG. 8 schematically illustrates another structural diagram of a devicefor configuring a common control channel according to an embodiment ofthe present disclosure.

DETAILED DESCRIPTION

As described in the background, there is a need for design of a commoncontrol channel, to achieve relatively high resource utilization.

In embodiments of the present disclosure, a common control channel and aprimary synchronization signal and/or a secondary synchronization signalare configured in a frequency division multiplexing manner, therebytransmitting the common control channel and the primary synchronizationsignal and/or the secondary synchronization signal on the same symbols(or, time resources), to achieve relatively high resource utilization.In this way, beam sweeping timings, latency of HARQ feedback, andcomplexity of system design may be reduced.

In embodiments of the present disclosure, a common control channel and asynchronization signal are configured to conduct the frequency divisionmultiplexing or the time division multiplexing, thereby improvingflexibility of the configuration of the common control message. Further,resource utilization of a subband resource where the user equipmentresides may be improved, and complexity of system design may be reduced.

In embodiments of the present disclosure, a demodulation referencesignal of the common control channel is configured so as to have varioususes, to further improve resource utilization.

In order to clarify the object, characteristic and advantages ofembodiments of the present disclosure, embodiments of present disclosurewill be described clearly in detail in conjunction with accompanyingdrawings.

In some embodiment, a channel for scheduling a common control message isreferred to as a common control channel or a search space, and a channelfor bearing the common control message is also referred to as a commoncontrol message bearer channel. The common control channel and thecommon control message are broadcasted to all user equipment, and alluser equipments include the user equipment in an idle state or aconnected state.

FIG. 1 schematically illustrates a flow diagram of a method forconfiguring a common control channel according to an embodiment of thepresent disclosure.

The method for configuring the common control channel of the embodimentis used in a base station side.

It is may be understood that, in a 5G system or other new technologysystems, a signal and a channel for detection and cell selection mayinclude a primary synchronization signal, a secondary synchronizationsignal and a broadcast channel, which may be similar with a primarysynchronization signal, a secondary synchronization signal and abroadcast channel in a LTE system or may be different from a design ofthe channel in Long Term Evolution (LTE) systems; or a different namemay be used, which is not limited by the embodiments.

The method for configuring the common control signal includes followingsteps:

S101: configuring the common control channel and a primarysynchronization signal and/or a secondary synchronization signal in asubband where a user equipment resides in a frequency divisionmultiplexing manner; and

S102: transmitting the common control channel by using configuredresources.

In some embodiment, the subband where the user equipment resides may bea part of a system bandwidth. Specifically, since the system bandwidthis wide, like 5 MHz, so that the user equipment may achieve the purposefor power saving. Broadcast signals and channels in the idle state,namely the primary synchronization signal, the secondary synchronizationsignal and a physical broadcast channel may be transmitted in thesubband where the user equipment resides. The word “subband” in thepresent disclosure may represent a portion of consecutive frequencyresources, and it may also be called bandwidth part and so forth.

Accordingly, in S101, configuring the common control channel and aprimary synchronization signal and/or a secondary synchronization signalin a subband where a user equipment resides in a frequency divisionmultiplexing manner. Specifically, when the user equipment resides inthe subband, the common control channel also may occupy resources in thesubband where the user equipment resides, further, the common controlchannel may occupy the same symbol with the primary synchronizationsignal and/or the secondary synchronization signal. For example, the PSSand the SSS occupy two symbols in a time slot, and the common controlchannel is configured to occupy one or two symbols in the two symbols.

Specifically, the primary synchronization signal and the secondarysynchronization signal occupy multiple consecutive physical resourceblocks, thus, the common control channel occupies at least one physicalresource block around the multiple consecutive physical resource blocks.

Specifically, information in PBCH may indicate the bandwidth of thesubband where the user equipment resides, in order that the userequipment resides in the subband. Further, PBCH also may indicate thebandwidth of frequency domain resources occupied by the common controlchannel, so that the user equipment may detect the common controlchannel to obtain scheduling information of the common control message.Specifically, since information beard by PBCH is limited, a position offrequency domain resources of the common control channel is relativelyfixed.

In some embodiment, in S102, transmitting the common control channel byusing configured resources. Since the common control channel multiplexesthe same time domain resource (namely the symbol) with the primarysynchronization signal and/or the secondary synchronization signal, thecommon control channel may conduct a transmission in the same beam withthe primary synchronization signal and/or the secondary synchronizationsignal, thereby achieving relatively high resource utilization; and beamsweeping timings, latency of HARQ feedback, and complexity of systemdesign may be reduced.

It needs to be clarified that, the common control channel is one type ofa physical downlink control channel, and frequency domain resourcesoccupied by the common control channel are also referred to as a controlresource set for the physical downlink control channel or a commoncontrol resource set for the physical downlink control channel or acontrol subband.

In some embodiment, S101 may include following steps: in a frequencydomain, the common control channel occupies at least a portion offrequency domain resources other than frequency domain resourcesoccupied by a SS/PBCH block in the subband, and the SS/PBCH blockcomprises the primary synchronization signal and the secondarysynchronization signal.

In some embodiment, referring to FIG. 2, FIG. 2 schematicallyillustrates an application scenario of the method for configuring thecommon control channel according to an embodiment of the presentdisclosure. As shown in FIG. 2, the subband where the user equipmentoccupies 24 physical resource blocks. Wherein, the SS/PBCH blockincludes the PSS, the SSS and the PBCH, and occupies 3 symbols in thetime domain, and 12 PRBs in the subband in the frequency domain.Specifically, the PSS and the SSS occupy the first two symbols in thetime domain, and 12 PRBs in the subband in the frequency domain; and thePBCH occupies the third symbol and 12 PBRs in the subband in thefrequency domain. Therefore, the common control channel may occupy atleast a portion of frequency domain resources other than frequencydomain resources occupied by the SS/PBCH block. More specifically, thecommon control signal may conduct the frequency division multiplexingwith the PSS and SSS, which occupies at least a portion of resourcesshown in a shadow part of FIG. 2.

In some embodiment, in the frequency domain corresponding to the symbolsoccupied by the PSS and SSS, the common control channel may occupy allfrequency domain resources other than frequency domain resourcesoccupied by the PSS and the SSS, which are all resources shown in theshadow part of FIG. 2.

In another embodiment of the present disclosure, referring to the FIG.3, FIG. 3 schematically illustrates another application scenario of themethod for configuring the common control channel according to anembodiment of the present disclosure.

In some embodiment, the SS/PBCH block includes the PSS, the SSS and thePBCH, and occupies 4 symbols in the time domain, and 12 PRBs in thesubband in the frequency domain. Specifically, the PSS and the SSSoccupy the first two symbols in the time domain, and 12 PRBs in thesubband in the frequency domain; and the PBCH occupies the third and thefourth symbol, and 12 PBRs in the subband in the frequency domain.Accordingly, the common control channel may occupy at least a portion offrequency domain resources other than frequency domain resourcesoccupied by the SS/PBCH block. More specifically, the common controlsignal may conduct the frequency division multiplexing with the PSS andthe SSS, which are at least occupying a portion of resources shown in ashadow part of FIG. 3.

In some embodiment, S101 may include following steps: in the frequencydomain, the common control channel occupies at least a portion offrequency domain resources other than frequency domain resourcesoccupied by the primary synchronization signal and the secondarysynchronization signal.

In some embodiment, referring to FIG. 4, FIG. 4 schematicallyillustrates another application scenario of the method for configuringthe common control channel according to an embodiment of the presentdisclosure. In this embodiment, compared with the PSS and the SSS, thePBCH in the SS/PBCH block may occupy more frequency domain resources inthe frequency domain.

As shown in FIG. 4, the subband where the user equipment residesoccupies 24 physical resource blocks. Wherein, the SS/PBCH blockincludes the PSS, the SSS and the PSS, and occupies 3 symbols in thetime domain, 24 PRBs in the subband in the frequency domain.Specifically, the PSS and the SSS occupy the first two symbols in thetime domain, and 12 PRBs in the subband in the frequency domain; and thePBCH occupies the third symbol in the time domain, and 24 PBRs in thesubband in the frequency domain. Accordingly, the common control channelmay occupy at least a portion of frequency domain resources other thanfrequency domain resources occupied by the PSS and the SSS, which is atleast a portion of resources shown in a shadow part of FIG. 4.

In some embodiment, the common control channel may occupy all frequencydomain resources other than frequency domain resources occupied by thePSS and the SSS, which are all resources shown in the shadow part ofFIG. 4.

Further, the common control channel is included in the synchronization.Specifically, referring to FIG. 4, when the common control channeloccupies at least a portion of frequency domain resources other thanfrequency domain resources occupied by the primary synchronizationsignal and the secondary synchronization signal, and the common controlchannel may be included in the SS/PBCH block.

In some embodiment, S101 may include following steps: in the timedomain, configuring the common control channel to occupy the firstsymbol or the first symbol and the second symbol occupied by the primarysynchronization signal and the secondary synchronization signal.Specifically, since the common control channel needs to schedule theuser equipment to receive the common control message, the common controlchannel occupies the first few symbols, and namely occupies the firstsymbol or the first symbol and the second symbols occupied by theprimary synchronization signal and the secondary synchronization signal.

In some embodiment, the method for configuring the common controlchannel shown in FIG. 1 may include following steps: configuring thecommon control channel and the SS/PBCH block in the subband where theuser equipment resides in the frequency division multiplexing manner.

In some embodiment, the common control channel schedules the userequipment to receive the common control message. For the common controlmessage, its resources occupied in the frequency domain may be resourceother than those occupied by the SS/PBCH block in the subband where theuser equipment resides, and in the time domain, it may occupy the samesymbols with the SS/PBCH block. More specifically, resources occupied bythe common control message in the frequency domain may be frequencydomain resource other than frequency resource occupied by the SS/PBCHblock and the common control channel in the subband where the userequipment resides.

Further, in the time domain, when the synchronization occupies 3symbols, if the common control channel generally occupies the firstsymbol in symbols occupied by the SS/PBCH block, the common controlmessage may occupy the second symbol and the third symbol; or if thecommon control channel generally occupies the first and the secondsymbols in the symbols occupied by the SS/PBCH block, the common controlmessage may occupy the third symbol. More specifically, a network sidemay schedule a subset of effective resources in the common controlmessage bearer channel through the common control channel to transmitthe common control message.

In some embodiment, the method for configuring the common controlchannel shown in FIG. 1 may include following steps: configuring thecommon control channel and the SS/PBCH block in the subband where theuser equipment resides in the time division multiplexing manner.

In some embodiment, resources occupied by the common control message andresources occupied by the SS/PBCH block may conduct the time divisionmultiplexing in the subband where the user equipment reside. That is,frequency domain resources occupied by the common control message andfrequency domain resources occupied by the SS/PBCH block are the same,and frequency domain resources occupied by the common control messageand frequency domain resources occupied by the SS/PBCH block aredifferent (namely occupying different symbols).

Embodiments of the present disclosure achieve different manners ofresource configuration for the common control message, and improveflexibility of the configuration of the common control message.

In some embodiment, the method for configuring the common controlchannel shown in FIG. 1 may include following steps: configuring amini-slot for the user equipment, and a number of symbols occupied bythe mini-slot is a number of symbols occupied by the SS/PBCH block, anda beam used by the mini-slot is a beam used by the SS/PBCH block.

In some embodiment, since the common control is configured with theprimary synchronization signal and/or the secondary synchronizationsignal in the frequency division multiplexing manner, the common controlchannel conducts the scheduling with the primary synchronization signaland/or the secondary synchronization signal in the same symbol. Sincethe primary synchronization signal and the secondary synchronizationsignal are included in the SS/PBCH block, through configuring themini-slot for the user equipment, and a number of symbols occupied bythe mini-slot being a number of symbols occupied by the SS/PBCH block,the user equipment may obtain the common control channel, the primarysynchronization signal and the secondary synchronization signal in themini-slot at the same time, keeping the user equipment from analyzingother resources, increasing resource utilization, and improving thecommunication efficiency of the user equipment as well.

Referring to the FIG. 2 and FIG. 3, the SS/PBCH block occupies 3symbols, so that the mini-slot may occupy 3 symbols, and the SS/PBCHblock shown in FIG. 4 occupies 4 symbols, so that the mini-slot mayoccupy 4 symbols. In an embodiment, a time domain unit for scheduling ofthe user equipment is the mini-slot, thereby preventing the userequipment from conducting the scheduling in the whole time slot (like 12or 14 symbols), which further increases resource utilization, andimproves communication efficiency of the user equipment and the network.

It needs to be cleared that, the number of symbols occupied by themini-slot and the number of symbols occupied by the SS/PBCH block may beother practical quantities, which is not limited in embodiments of thepresent disclosure.

In some embodiment, in scheduling information transmitted by the commoncontrol channel, a location of the physical resource block occupied bythe common control message bearer channel is indicated, or an index of aresource block group occupied by the common control message bearerchannel is indicated.

In some embodiment, the common control channel indicates the location ofresource occupied by the common control message bearer channel.Specifically, in scheduling information, a location of the physicalresource block or an index of the resource block group occupied by thecommon control message bearer channel may be indicated.

In some embodiment, in scheduling information transmitted by the commoncontrol channel, a location of the physical resource block occupied byuser equipment dedicated data is indicated, or an index of a resourceblock group occupied by the user equipment dedicated data is indicated.

In some embodiment, effective resources in the common control messagebearer channel are configured to transmit other data except the commoncontrol message, which may be the user equipment dedicated data.Therefore, in scheduling information, a location of the physicalresource block or an index of the resource block group occupied by thecommon control message bearer channel may be indicated.

Further, after the user equipment accesses a network, the networkindicates resources occupied by the SS/PBCH block to the user equipment,like the number of symbols, so that in the time slot of the SS/PBCHblock, the user equipment may determine remain resources in the timeslot, like the number of symbols. Accordingly, remaining resources maybe scheduled to use, in order to transmit the common control message orthe user equipment dedicated data. In other words, the user equipmentmay receive the common control message and the user equipment dedicateddata in remaining resources according to the indication from the commoncontrol channel.

It needs to be clarified that, effective resources occupied by thecommon control channel and effective resources occupied by the commoncontrol message are also referred to as a public control block.

In some embodiment, the common control channel may schedule the commoncontrol message and the user equipment dedicated data, thereby extendinguses of the common control channel, further improving resourceutilization.

FIG. 5 schematically illustrates another flow diagram of the method forconfiguring the common control channel according to an embodiment of thepresent disclosure.

The method for configuring the common control channel includes followingsteps:

S401: configuring a common control channel and a primary synchronizationsignal and/or a secondary synchronization signal in a subband where auser equipment resides in a frequency division multiplexing manner;

S402: configuring a demodulation reference signal of the common controlchannel for time and frequency synchronization of the user equipment;

S403: when the user equipment transmits and receives data in differentsubbands, configuring different patterns of the demodulation referencesignal for the user equipment according to a numerology of differentsubbands, the different patterns of the demodulation reference signal atleast including different pseudorandom sequences or differenttime-frequency resource locations;

S404: notifying the user equipment of the different patterns of thedemodulation reference signal by using a RRC signaling; and

S405: transmitting the common control channel by using configuredresources.

In some embodiment, details of S401 and S405 may be referred to S101,S102 and the related description in FIG. 2, FIG. 3, FIG. 4, and are notdescribed in detail here.

In some embodiment, S402 may include following steps: configuring aninitial value of a pseudorandom sequence for the demodulation referencesignal according to a cell identity and a synchronization signal beamidentity, which leads to an interference randomization among thedemodulation reference signals between different cells or differentbeams.

Specifically, in order to distinguish different cells and differentsynchronization signal beams, the initial value of a pseudorandomsequence for the demodulation reference signal is configured to relateto the cell identity and the synchronization signal beam identity. Thesynchronization signal beam identity is also referred to as a SS/PBCHblock index, which leads to the interference randomization between thedemodulation reference signals between different cells or differentbeams. After receiving the demodulation reference signal, the userequipment distinguishes different cells and different synchronizationsignal beams, in order to conduct a time and frequency synchronization(namely time and frequency tracking).

Further, the user equipment conducts a frequency domain autocorrelationon a channel estimated according to the demodulation reference signal,to obtain time synchronization; and the user equipment conducts a timedomain autocorrelation on the channel estimated according to thedemodulation reference signal, to obtain frequency synchronization.

It needs to be clarified that, the demodulation reference signal may bethe demodulation reference signal, or other practical reference signalswhich may conduct channel estimation, which is not limited inembodiments of the present disclosure.

Specifically, the user equipment conducts the frequency domainautocorrelation on the channel estimated according to the demodulationreference signal to obtain time synchronization. The user equipmentfurther conducts the time domain autocorrelation on the channelestimated according to the demodulation reference signal to obtainfrequency synchronization. Furthermore, the PSS and the SSS also assistthe demodulation reference signal to conduct time and frequencysynchronization, and the user equipment conducts a cross-correlation onthe received PSS/SSS and the local PSS/SSS.

In some embodiment, in S403 and S404, since the network configures theuser equipment to transmit and receive data in different subbands, andthe numerology of different subbands may be different, the networkconfigures different patterns of the demodulation reference signal forthe user equipment in different subbands, and patterns of referencesignal are notified to the user equipment by the RRC signaling.Different patterns of the demodulation reference signal at least includedifferent pseudorandom sequences or different time-frequency resourcelocations.

In some embodiment, the method for configuring the common controlchannel further configures the demodulation reference signal of thecommon control channel for beam training, to obtain a reference signalreceiving power for a synchronization signal beam. In some embodiment,since the common control channel occupies the same symbol with theprimary synchronization signal and the secondary synchronization signal,each symbol allows the user equipment to conduct a training of the basestation transmitting beam, so that the user equipment may conduct atleast beam training on the common control channel.

In some embodiment, a channel state information reference signal(CSI-RS) is configured for a measurement of a channel quality and a beamtracking (training), and in order to reduce a burden of CSI-RS resourcefor the beam tracking, demodulating the demodulation reference signal ofthe common control channel is also configured for the beam tracking.

Further, a quasi-co-location placement port is configured for an antennaof the demodulation reference signal of the common control channel andan antenna of a channel state information reference signal, or aquasi-co-location placement is configured for the antenna of thedemodulation reference signal of the common control channel and theantenna of the channel state information reference signal. That is, whenthe demodulation reference signal of the common control channel conductsbeam training, it has the same function with the channel stateinformation reference signal, so that the demodulation reference signalof the common control channel may be transmitted to the user equipmentas the channel state information reference signal.

In some embodiment, in order that the demodulation reference signal ofthe common control channel is configured for beam training of the userequipment, multiple subdivided beams in each synchronization signal beamare configured to correspond to multiple ports of the demodulationreference signal, such that the user equipment measures the demodulationreference signal of the multiple ports, to obtain the reference signalreceiving power for the subdivided beam and the reference signalreceiving power for the synchronization signal beam.

Specifically, the network side deploys two layers of beams for thesynchronization signal beam, where one layer is a synchronization signalbeam (also referred to as an initial access beam), which is a widerbeam, and the other layer is a thin synchronization signal beam (thatis, a subdivided beam), which is a thin beam. For example, a coverageangle of the synchronization signal beam is 60 degrees and a coverageangle of the subdivided beam is 15 degrees. Specifically, thesynchronization signal beam includes multiple subdivided beams withcontinuous angles, so that a port of the demodulation reference signalis configured to correspond to a subdivided beam. Since the demodulationreference signal have multiple ports, multiple subdivided beamscorrespond to multiple ports of the demodulation reference signal.

Further, a number of the multiple ports may be notified to the userequipment in a physical broadcast channel. Specifically, in order thatthe user equipment know a port number P of the demodulation referencesignal, the network notifies the port number P of the demodulationreference signal to the user equipment in the physical broadcastchannel. Specifically, the port number P of the demodulation referencesignal may be {1, 2, 4, 8}, so that the physical broadcast channelnotifies the port number P of the demodulation reference signal to theuser equipment using 2 bits.

In some embodiment, the user equipment averages the measured referencesignal receiving power for the subdivided beam corresponding to themultiple ports, to obtain the reference signal receiving power for thesynchronization signal beam. Specifically, the user equipment obtainsthe reference signal receiving power (RSRP) of the correspondingsubdivision beam through measuring a port of the demodulation referencesignal. Further, after the user equipment knows the port number P of thedemodulation reference signal, the user equipment averages the RSRP forthe subdivided beam corresponding to the demodulation reference signalof the P ports, to obtain the RSRP for the synchronization signal beam.Furthermore, when the user equipment is in the connected state, thenetwork triggers the user equipment to report the RSRP of the subdividedbeam.

Further, the user equipment obtain the RSRP of the synchronizationsignal beam by the demodulation reference signal measurement, so thatthe reference signal receiving power for the synchronization signal beamis lower than a set power threshold, the user equipment conduct beamtraining again. Specifically, since the demodulation reference signalfor demodulating the common control channel is configured for beamtraining of the user equipment, the demodulation reference signal isalso configured for a radio link monitoring (RLM); when the RSRP for thesynchronization signal beam is lower than the set power threshold, theuser equipment determines the link failure and initial a re-accessmechanism, that is conducting beam training again.

In some embodiment, each port of the demodulation reference signal ofthe common control channel may be configured to correspond to adjacentmultiple subcarriers. Further, a particular subcarrier rightcorresponding to the port and two adjacent subcarriers of the particularsubcarrier on the common control channel constitute a subcarrier group.One physical resource block includes four subcarrier groups, andcorresponds to four ports of the demodulation reference signal.

Specifically, the demodulation reference signal is also configured forchannel estimation of each port by the user equipment, and demodulatingthe common control channel according to a result of channel estimation.Since the port number of the demodulation reference signal may be 8, thetransmission scheme of the common control channel may be a transmitdiversity scheme up to 8 ports. To simplify the transmit diversity up to8 ports, the transmit diversity of a frequency division mode is applied,that is a Port A corresponds to a Port A subcarrier and adjacent datasubcarriers. Specially, the Port A corresponds to the Port A subcarrierand two adjacent subcarriers. The Port A subcarrier and two adjacentdata subcarriers have the same channel, so that the user equipmentdemodulate two adjacent data subcarriers using the channel estimated bythe Port A subcarrier.

Further, the Port A subcarrier and two adjacent data subcarriersconstitute the subcarrier group. In a new radio system, a single PRBincludes 12 subcarriers, so that the single PRB includes 4 subcarriergroups, and the single PRB corresponds to 1 port or 2 ports, or 4 ports.If one PRB corresponds to 8 ports, two PRBs are required, that is, 8subcarrier groups are required, corresponding to 8 ports respectively.

Those skilled in the art may understand that, a transmission scheme of asingle frequency network (SFN) is applied for the PSS/SSS/PBCH withinthe SS/PBCH block. The P ports of the demodulation reference signalcorresponds to a virtual port, and a virtual port corresponds to areference signal, and the user equipment only determines a virtual port;or, the P ports of the demodulation reference signal correspond to 2virtual ports, and a virtual port corresponds to a demodulation signalreference signal, and the user equipment may only determine 2 virtualports.

Configuring the user equipment to conduct a monitoring of thedemodulation reference signal for at least a portion of a frequency ofthe subband. From the previous embodiment, the demodulation referencesignal of the common control channel is configured for time andfrequency synchronization and beam training of the user equipment, sothat the network configures the user equipment to monitor thedemodulation reference signal in the subband where the user equipmentresides. Specially, the network configures the user equipment to monitorthe demodulation reference signal in any subsets of the frequency of thesubband where the user equipment resides.

In embodiments of the present disclosure, the demodulation referencesignal of the common control channel is configured so as to conduct timeand frequency synchronization, beam training and radio link monitoring,and have various uses, thereby further improving resource utilization.

Embodiments of the present disclosure further provide a method forreceiving a common control channel, and the receiving method includesfollowing steps: receiving the common control channel by configuredresources, wherein the common control channel conducting a frequencydivision multiplexing manner with a primary synchronization signaland/or a secondary synchronization signal in a subband where a userequipment resides.

In some embodiment, in a frequency domain, the common control channeloccupies at least a portion of frequency domain resources other thanfrequency domain resources occupied by a SS/PBCH block in the subband.In another way, in the frequency domain, the common control channeloccupies at least a portion of frequency domain resources other thanfrequency domain resources occupied by the primary synchronizationsignal and the secondary synchronization signal. Further, the commoncontrol channel is included in the SS/PBCH block.

The receiving method further includes following steps: receiving ademodulation reference signal of the common control channel, therebyconducting time and frequency synchronization.

The receiving method further includes following steps: receiving thedemodulation reference signal of the common control channel, therebyconducting beam training, and obtaining a reference signal receivingpower for a synchronization signal beam.

In some embodiment, more details about principles and manners of themethod for receiving a common control channel may refer to descriptionin FIG. 1 to FIG. 4, and are not described in detail here.

FIG. 6 schematically illustrates a structural diagram of a device forconfiguring a common control channel according to an embodiment of thepresent disclosure.

A device for configuring a common control channel 50 shown in FIG. 6includes a common channel configuration circuitry 501 and a transmissioncircuitry 502.

The common channel configuration circuitry 501 is configured toconfigure the common control channel and a primary synchronizationsignal and/or a secondary synchronization signal in a subband where auser equipment resides in a frequency division multiplexing manner. Thetransmission circuitry 502 is configured to transmit the common controlchannel using configured resources.

In some embodiment, the common channel configuration circuitry 501configures the common control channel and a primary synchronizationsignal and/or a secondary synchronization signal in a subband where auser equipment resides in a frequency division multiplexing manner.Further, the common control channel may occupy the same symbol with theprimary synchronization signal and/or the secondary synchronizationsignal. Specifically, the primary synchronization signal and thesecondary synchronization signal occupy multiple consecutive physicalresource blocks, thus, the common control channel occupies at least aphysical resource block around the multiple consecutive physicalresource blocks.

In some embodiment, the transmission circuitry 502 transmits the commoncontrol channel using configured resources. Since the common controlchannel multiplexes the same time domain resource (namely the symbol)with the primary synchronization signal and/or the secondarysynchronization signal, the common control channel may conduct atransmission in the same beam with the primary synchronization signaland/or the secondary synchronization signal, thereby achievingrelatively high resource utilization. In this way, beam sweepingtimings, latency of HARQ feedback, and complexity of the system designmay be reduced.

More details about principles and manners of the transmission circuitry502 may be referred to description in FIG. 1 to FIG. 4, and are notdescribed in detail here.

FIG. 7 schematically illustrates a structural diagram of a commonchannel configuration circuitry shown in FIG. 6.

As shown in FIG. 7, the common channel configuration circuitry 501includes a first common control channel configuration sub-circuitry 61,a second common control channel configuration sub-circuitry 62, and athird common control channel configuration sub-circuitry 63.

The first common control channel configuration sub-circuitry 61 isconfigured to configure the common control channel to occupy at least aportion of frequency domain resources other than frequency domainresources occupied by a SS/PBCH block in the subband in a frequencydomain, and the SS/PBCH block includes the primary synchronizationsignal and the secondary synchronization signal. The second commoncontrol channel configuration sub-circuitry 62 is configured toconfigure the common control channel to occupy at least a portion offrequency domain resources other than frequency domain resourcesoccupied by the primary synchronization signal and the secondarysynchronization signal in the frequency domain. Further, the commoncontrol channel is included in the SS/PBCH block.

The third common control channel configuration sub-circuitry 63 isconfigured to configure the common control channel to occupy the firstsymbol or the first symbol and the second symbol occupied by the primarysynchronization signal and the secondary synchronization signal in atime domain.

Embodiments of the present disclosure achieve different manners ofresource configuration for the common control channel through the firstcommon control channel configuration sub-circuitry 61, The second commoncontrol channel configuration sub-circuitry 62 and the third commoncontrol channel configuration sub-circuitry 63, and thereby improvingflexibility of the configuration of the common control channel.

FIG. 8 schematically illustrates another structural diagram of a devicefor configuring the common control channel according to an embodiment ofthe present disclosure.

In some embodiment, more details about a common channel configurationcircuitry 701 maybe referred to description in FIG. 6 and FIG. 7, andare not described in detail here.

In some embodiment, a device for configuring a common control channel 70shown in FIG. 8 further includes a first common control messageconfiguration circuitry 702 and a second common control messageconfiguration circuitry 703. The first common control messageconfiguration circuitry 702 is configured to configure the commoncontrol channel and the SS/PBCH block in the subband where the userequipment resides in a frequency division multiplexing manner. Thesecond common control message configuration circuitry 703 is configuredto configure the common control channel and the SS/PBCH block in thesubband where the user equipment resides in a time division multiplexingmanner.

Embodiments of the present disclosure achieve different manners ofresource configuration for the common control message through the firstcommon control message configuration circuitry 702 and the second commoncontrol message configuration circuitry 703, and thereby improvingflexibility of the configuration of the common control message.

In some embodiment, the device for configuring a common control channel70 shown in FIG. 8 further includes a mini-slot configuration circuitry704. The mini-slot configuration circuitry 704 is configured toconfigure a mini-slot for the user equipment, and a number of symbolsoccupied by the mini-slot is a number of symbols occupied by the SS/PBCHblock, and a beam used by the mini-slot is a beam used by the SS/PBCHblock.

In some embodiment, the device for configuring a common control channel70 shown in FIG. 8 further includes a common control message bearerchannel indication circuitry 706 and a user equipment dedicated datacircuitry 707. The common control message bearer channel indicationcircuitry 706 is configured to indicate a location of a physicalresource block occupied by a common control message bearer channel, orindicate an index of a resource block group occupied by the commoncontrol message bearer channel in scheduling information transmitted bythe common control channel. The user equipment dedicated data circuitry707 is configured to indicate a location of the physical resource blockoccupied by user equipment dedicated data, or indicating an index of aresource block group occupied by the user equipment dedicated data, orindicate an index of a resource block group occupied by the userequipment dedicated data.

In some embodiment, the common control channel may schedule the commoncontrol message and user equipment dedicated data, thereby extendinguses of the common control channel, further improving resourceutilization.

In some embodiment, the device for configuring a common control channel70 further includes a time and frequency synchronization circuitry 705.The time and frequency synchronization circuitry 705 is configured toconfigure a demodulation reference signal of the common control channelfor time and frequency synchronization of the user equipment.

In some embodiment, the time and frequency synchronization circuitry 705includes: an initial value configuration sub-circuitry 7051 configuredto configure an initial value of a pseudorandom sequence for thedemodulation reference signal according to a cell identity and asynchronization signal beam identity, which leads to a interferencerandomization between the demodulation reference signals betweendifferent cells or different beams; a reference signal patternconfiguration sub-circuitry 7052, which is configured to configuredifferent patterns of the demodulation reference signal for the userequipment according to a numerology of different subbands when the userequipment transmits and receives data in different subbands, whereindifferent patterns of the demodulation reference signal at least includedifferent pseudorandom sequences or different time-frequency resourcelocations; and a demodulation reference signal pattern transmissionsub-circuitry 7053, configured to notify the user equipment of thedifferent patterns of the demodulation reference signal using a RRCsignaling. Specifically, the user equipment conducts a frequency domainautocorrelation on a channel estimated according to the demodulationreference signal, to obtain time synchronization, and conducts a timedomain autocorrelation on the channel estimated according to thedemodulation reference signal, to obtain frequency synchronization.

In some embodiment, the device for configuring a common control channel70 further includes beam training configuration circuitry 708, which isconfigured to configure the demodulation reference signal of the commoncontrol channel for beam training, to obtain a reference signalreceiving power for a synchronization signal beam.

In some embodiment, beam training configuration circuitry 708 includes:a beam configuration sub-circuitry 7081, configured to configuremultiple subdivided beams in each synchronization signal beam tocorrespond to multiple ports of the demodulation reference signal, suchthat the user equipment measures the demodulation reference signal ofthe multiple ports, to obtain the reference signal receiving power forthe subdivided beam and the reference signal receiving power for thesynchronization signal beam; and a port number transmissionsub-circuitry 7082, which is configured to notify a number of themultiple ports to the user equipment in a physical broadcast channel.

In embodiments of the present disclosure, the demodulation referencesignal of the common control channel is configured so as to conduct timeand frequency synchronization and beam training, and have various uses,and further improve resource utilization.

In some embodiment, the device for configuring a common control channel70 further includes a reference signal monitoring configurationcircuitry 709. The demodulation reference signal monitoringconfiguration circuitry 709 is configured to configure the userequipment to conduct a monitoring of the demodulation reference signalfor at least a portion of a frequency of the subband.

In some embodiment, the device for configuring a common control channel70 further includes a subcarrier configuration circuitry 710. Thesubcarrier configuration circuitry 710 is configured to configure eachport of the demodulation reference signal of the common control channelto correspond to adjacent multiple subcarriers.

In some embodiment, the device for configuring a common control channel70 further includes a reference signal configuration circuitry 711. Thedemodulation reference signal configuration circuitry 711 is configuredto configure a quasi-co-location placement port for an antenna of thedemodulation reference signal of the common control channel and anantenna of a channel state information reference signal, or configure aquasi-co-location placement for the antenna of the demodulationreference signal of the common control channel and the antenna of thechannel state information reference signal.

More details about the device for configuring a common control channel70 maybe referred to description in FIG. 1 to FIG. 7, and are notdescribed in detail here.

Embodiments of the present disclosure further provide a device forreceiving a common control channel, which includes a common controlchannel receiving circuitry (not shown in any figures). The commoncontrol channel receiving circuitry receives the common control channelby configured resources, wherein the common control channel conducts afrequency division multiplexing manner with a primary synchronizationsignal and/or a secondary synchronization signal in a subband where auser equipment resides.

In some embodiment, in a frequency domain, the common control channeloccupies at least a portion of frequency domain resources other thanfrequency domain resources occupied by a SS/PBCH block in the subband.In another way, in the frequency domain, the common control channeloccupies at least a portion of frequency domain resources other thanfrequency domain resources occupied by the primary synchronizationsignal and the secondary synchronization signal. Further, the commoncontrol channel is included in the SS/PBCH block.

In some embodiment, the receiving method further includes a firstdemodulation reference signal receiving circuitry (not shown in anyfigures). The first demodulation reference signal receiving circuitryreceives a demodulation reference signal of the common control channel,thereby conducting time and frequency synchronization.

In some embodiment, the receiving method further includes a seconddemodulation reference signal receiving circuitry (not shown in anyfigures). The second demodulation reference signal receiving circuitryreceives the demodulation reference signal of the common controlchannel, thereby conducting beam training, and obtaining a referencesignal receiving power for a synchronization signal beam.

In some embodiment, more details about principles and manners of thedevice for receiving a common control channel maybe referred todescription in FIG. 1 to FIG. 7, and it are not described in detailhere.

Those skilled in the art may understand that all or part of steps ofabove methods may be completed by relevant hardware once the programinstruction are executed, and the program may be storage in a computerreadable storage medium, such as a Read-Only memory (ROM), a RandomAccess Memory (RAM), a magnetic disk or an optical disk.

What is claimed is:
 1. A method for configuring a common controlchannel, comprising: configuring a common control channel and a primarysynchronization signal and/or a secondary synchronization signal in asubband where a user equipment resides in a frequency divisionmultiplexing manner; configuring a quasi-co-location placement port foran antenna of a demodulation reference signal of the common controlchannel and an antenna of a channel state information reference signal,or configuring a quasi-co-location placement for the antenna of thedemodulation reference signal of the common control channel and theantenna of the channel state information reference signal; andtransmitting the common control channel by using configured resources.2. The method according to claim 1, wherein configuring the commoncontrol channel and the primary synchronization signal and/or thesecondary synchronization signal in the subband where the user equipmentresides in the frequency division multiplexing manner comprises: in afrequency domain, the common control channel occupying at least aportion of frequency domain resources other than frequency domainresources occupied by a SS/PBCH block in the subband, wherein theSS/PBCH block comprises the primary synchronization signal and thesecondary synchronization signal.
 3. The method according to claim 1,wherein configuring the common control channel and the primarysynchronization signal and/or the secondary synchronization signal inthe subband where the user equipment resides comprises: in the frequencydomain, the common control channel occupying at least a portion offrequency domain resources other than frequency domain resourcesoccupied by the primary synchronization signal and the secondarysynchronization signal.
 4. The method according to claim 3, wherein thecommon control channel is comprised in the SS/PBCH block.
 5. The methodaccording to claim 1, wherein configuring the common control channel andthe primary synchronization signal and/or the secondary synchronizationsignal in the subband where the user equipment resides in the frequencydivision multiplexing manner comprises: in a time domain, configuringthe common control channel to occupy a first symbol or the first symboland the second symbol occupied by the primary synchronization signal andthe secondary synchronization signal.
 6. The method according to claim1, further comprising: configuring a mini-slot for the user equipment,wherein a number of symbols occupied by the mini-slot is a number ofsymbols occupied by the SS/PBCH block, and a beam used by the mini-slotis a beam used by the SS/PBCH block.
 7. The method according to claim 1,further comprising: in scheduling information transmitted by the commoncontrol channel, indicating a location of a physical resource blockoccupied by a common control message bearer channel, or indicating anindex of a resource block group occupied by the common control messagebearer channel.
 8. The method according to claim 1, further comprising:in scheduling information transmitted by the common control channel,indicating a location of the physical resource block occupied by userequipment dedicated data, or indicating an index of a resource blockgroup occupied by the user equipment dedicated data.
 9. The methodaccording to claim 1, further comprising: configuring the demodulationreference signal of the common control channel for time and frequencysynchronization of the user equipment.
 10. The method according to claim9, wherein configuring the demodulation reference signal of the commoncontrol channel for time and frequency synchronization of the userequipment comprises: configuring an initial value of a pseudorandomsequence for the demodulation reference signal according to a cellidentity and a synchronization beam identity, to cause an interferencerandomization among the demodulation reference signals between differentcells or different synchronization beams.
 11. The method according toclaim 10, wherein the user equipment conducts a frequency domainautocorrelation on a channel estimated according to the demodulationreference signal, to obtain time synchronization; and conducts a timedomain autocorrelation on the channel estimated according to thedemodulation reference signal, to obtain frequency synchronization. 12.The method according to claim 1, further comprising: configuring thedemodulation reference signal of the common control channel for beamtraining of the user equipment, to obtain a reference signal receivingpower for a synchronization signal beam.
 13. The method according toclaim 12, wherein configuring the demodulation reference signal of thecommon control channel for beam training comprises: configuring multiplesubdivided beams in each synchronization signal beam to correspond tomultiple ports of the demodulation reference signal, so that the userequipment measures the demodulation reference signal of the multipleports, to obtain the reference signal receiving power for the subdividedbeam and the reference signal receiving power for the synchronizationsignal beam.
 14. The method according to claim 13, wherein the userequipment averages the measured reference signal receiving power of thesubdivided beam corresponding to multiple ports, to obtain the referencesignal receiving power for the synchronization signal beam.
 15. Themethod according to claim 13, wherein prior to configuring multiplesubdivided beams in each synchronization signal beam to correspond tomultiple ports of the demodulation reference signal, the method furthercomprises: notifying a number of the multiple ports to the userequipment in a physical broadcast channel.
 16. The method according toclaim 13, wherein when the reference signal receiving power of thesynchronization signal beam is lower than a predetermined powerthreshold, the user equipment conducts beam training again.
 17. Themethod according to claim 12, wherein the method further comprises:configuring the user equipment to conduct monitoring of the demodulationreference signal for at least a portion of frequency in the subband. 18.The method according to claim 1, further comprising: configuring eachport of the demodulation reference signal of the common control channelto correspond to a plurality of adjacent subcarriers.
 19. The methodaccording to claim 18, wherein a particular subcarrier rightcorresponding to the port and two adjacent subcarriers of the particularsubcarrier on the common control channel constitute a subcarrier group,and one physical resource block includes four subcarrier groups, andcorresponds to four ports of the demodulation reference signal.